US6426576B1 - Electric machine having rotor adapted for high speed - Google Patents

Electric machine having rotor adapted for high speed Download PDF

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Publication number
US6426576B1
US6426576B1 US09/436,838 US43683899A US6426576B1 US 6426576 B1 US6426576 B1 US 6426576B1 US 43683899 A US43683899 A US 43683899A US 6426576 B1 US6426576 B1 US 6426576B1
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US
United States
Prior art keywords
shaft
pole piece
rotor
magnets
axis
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US09/436,838
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English (en)
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US20020047424A1 (en
Inventor
Pierre Varenne
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Conception et Developpement Michelin SA
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Conception et Developpement Michelin SA
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Application filed by Conception et Developpement Michelin SA filed Critical Conception et Developpement Michelin SA
Assigned to CONCEPTION ET DEVELOPPEMENT MICHELIN S.A. reassignment CONCEPTION ET DEVELOPPEMENT MICHELIN S.A. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: VARENNE, PIERRE
Publication of US20020047424A1 publication Critical patent/US20020047424A1/en
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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2706—Inner rotors
    • H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
    • H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
    • H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
    • H02K1/2766—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM] having a flux concentration effect
    • H02K1/2773—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM] having a flux concentration effect consisting of tangentially magnetized radial magnets

Definitions

  • the invention relates to an electric machine having a rotor which carries permanent magnets, and more precisely, a rotor in which the magnets are retained within recesses of the rotor.
  • the electric machines in question are commonly described as having “embedded magnets.” This rotor arrangement principle is widely applied for automatic synchronous machines with flux concentration.
  • the size of a rotating electric machine of this type depends on its rated load torque. The greater the torque that a motor is capable of delivering, the more voluminous the electric motor, everything else being equal. There are, however, applications for which it is desirable to attain both high power and great compactness of the motor.
  • the space occupied to be very compact, exceeding the interior volume of the wheel as little as possible in order not to interfere with the clearances of the parts of the vehicle in suspension movements and with other types of motion of the wheel relative to the body of the vehicle.
  • the object of the invention is to propose a rotating electric machine design which makes it possible to attain high speeds of rotation, at least up to 12,000 revolutions per minute, for example, without encountering any problem either of torque transmission or of rotor centrifugation.
  • the rotating electric machine having an outer casing forming a support structure for a stator, has a rotor comprising:
  • a shaft made in a single piece of nonmagnetic material mounted by means of bearings on the outer casing, said bearings defining an axis of rotation of said shaft;
  • a lateral flange mounted axially at each end of said shaft
  • tie rods connecting the lateral flanges passing through each pole piece and enclosing each pole piece between the lateral flanges, in which said shaft, seen in section perpendicular to the axis of rotation, forms a convex noncircular figure, cooperating with said assembly to immobilize it in relative rotation on said shaft.
  • the configuration of the shaft makes possible a torque transmission direct from the pole pieces to the shaft, at least in localized fashion or preferably over the whole axial length of the pole pieces.
  • the shaft seen in section perpendicular to the axis of rotation, preferably forms a regular convex polygon, containing plane facets separated by edges.
  • a hexagonal polygon is particularly favorable to torque passage from the pole pieces to the shaft, while ensuring good compactness of the shaft.
  • FIG. 1 is a perspective showing the rotor of a motor according to the invention.
  • the drawing shows a hexapolar machine in which the rotor 1 , the shaft 2 and the position of the bearings 20 can be seen. Ferromagnetic sheets 3 assembled in six pole pieces 30 are visible. Each sheet is roughly perpendicular to the axis of the shaft.
  • the invention can also be used with solid pole pieces.
  • a lateral flange 5 (preferably of nonmagnetic material) is situated on each side of the assembly of pole pieces 30 .
  • Each lateral flange 5 has a central recess, the shape of which is adjusted to that of the shaft 2 .
  • One tie rod 6 per pole piece 30 crosses through each stack of sheets 3 and makes it possible to retain between the flanges 5 .
  • Permanent magnets 4 are placed in the housings between the pole pieces 30 .
  • the radially outer side 32 of each sheet 3 is an arc of a circle centered on the axis of the rotor. Flanking that side 32 , two small lugs 33 retain the magnets 4 against centrifugal force. Furthermore, the magnets are glued in their housing.
  • the tie rods 6 transfer the stresses due to the centrifugal force on the lateral flanges 5 .
  • the latter being perfectly integral with the shaft 2 by their design in a single piece crossed by and adjusted on said shaft 2 ; holding of all the parts of the rotor on centrifugation is therefore assured.
  • the tie rods 6 oppose the centrifugal force that the magnets 4 exert on the sheets 3 of each pole piece and the centrifugal force that the sheets 3 themselves undergo (the effect due to friction between each sheet as well as gluing of the magnets 4 on the shaft 2 being overlooked).
  • the air gap between the rotor 1 and the stator (not) shown should also be as small as possible in order to keep the reluctance of the magnetic circuit as low as possible.
  • the shaft 2 is very compact, for it does not contain any dovetail or similar arrangement intended to retain the pole pieces and/or magnets when subjected to centrifugation.
  • intermediate flanges 7 are preferably of nonmagnetic material. That limits sheet displacements at the cost of a slight increase in axial length of the inactive rotor in order to develop a flux in the air gap. It makes it possible to lengthen the rotor, if necessary, by multiplying the number of intermediate flanges, while guaranteeing that the small air gap remains compatible with very high speeds of rotation.
  • Each pole piece 30 is thus divided into several sectors 30 A, 30 B . . . aligned axially and separated by an intermediate flange 7 , preferably of nonmagnetic material, each intermediate flange 7 having a central recess of shape complementary to that of the shaft.
  • the intermediate flange 7 can, on mounting, be very easily attached on the shaft 2 .
  • Each intermediate flange 7 is, just like the lateral flanges 5 , perfectly integral with the shaft 2 by its design in a single piece crossed by and adjusted on said shaft 2 .
  • Each intermediate flange 7 therefore contributes to resisting the displacements that centrifugation could cause at very high speeds of rotation.
  • Each intermediate flange is transversed by at least one of said tie rods 6 per pole piece.
  • the shaft contains a convex polygonal bearing also opposite each intermediate flange 7 , cooperating with facets of complementary shape provided on the central recess 70 of each of the intermediate flanges 7 in order to immobilize it in relative rotation on said shaft.
  • the shaft contains a convex polygonal bearing also opposite each lateral flange 5 , cooperating with facets of complementary shape arranged on the central recess 50 of each of the lateral flanges 5 in order to immobilize it in relative rotation on said shaft.
  • the shaft preferably presents an identical section (polygonal here) at any axial position between the lateral flanges 5 and opposite the latter, which maximizes the useful length on transmission of torque.
  • the shaft is of hexagonal section here over almost the total axial length between the bearings 20 .
  • the sheet assembly as well as the lateral and intermediate flanges contribute to transmission of the torque to the shaft, which reduces the stresses in said flanges.
  • each of the magnets 4 is in direct contact on the shaft 2 ; the latter consists of a single piece; each magnet bears on one of the flat faces of the polygon.
  • That design principle requires the shaft to be of nonmagnetic material in order for the shaft not to create any magnetic short circuit.
  • Each sheet of a pole piece presents a section perpendicular to the axis of rotation having a triangular general course, the apex 31 of which is formed to be exactly centered on one of the six edges 21 of the shaft 2 .
  • the stator In order to further improve the compactness of the motor, it can be arranged for the stator to contain a duct for the circulation of a cooling liquid, for example, a coolant of the type used for cooling heat engines of motor vehicles.
  • a cooling liquid for example, a coolant of the type used for cooling heat engines of motor vehicles.
  • alternators can be built in the same way.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)
US09/436,838 1998-11-13 1999-11-09 Electric machine having rotor adapted for high speed Expired - Lifetime US6426576B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9814442 1998-11-13
FR98/14442 1998-11-13

Publications (2)

Publication Number Publication Date
US20020047424A1 US20020047424A1 (en) 2002-04-25
US6426576B1 true US6426576B1 (en) 2002-07-30

Family

ID=9532836

Family Applications (1)

Application Number Title Priority Date Filing Date
US09/436,838 Expired - Lifetime US6426576B1 (en) 1998-11-13 1999-11-09 Electric machine having rotor adapted for high speed

Country Status (6)

Country Link
US (1) US6426576B1 (de)
EP (1) EP1001507B1 (de)
JP (1) JP2000152537A (de)
AT (1) ATE319213T1 (de)
DE (1) DE69930040T2 (de)
ES (1) ES2257837T3 (de)

Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030090167A1 (en) * 1999-10-14 2003-05-15 Denso Corporation Rotary electric machine for electric vehicle
US20030222526A1 (en) * 2002-05-15 2003-12-04 Hitachi, Ltd. Permanent magnet rotating electric machine
US20040004407A1 (en) * 2002-04-29 2004-01-08 Daniel Laurent Electrical machine having a rotor specially adapted to high speeds
US20040119344A1 (en) * 2002-12-23 2004-06-24 Lau Collins Yu Cheong Electric actuator
US20060061227A1 (en) * 2004-09-21 2006-03-23 A.O. Smith Corporation Spoke permanent magnet rotor
US20060097601A1 (en) * 2004-11-10 2006-05-11 Willi Hauger Rotor arrangement for an electric machine and a method for the manufacture of a rotor arrangement
US20060125438A1 (en) * 2004-12-09 2006-06-15 Fanuc Ltd Synchronous controller
US20060208590A1 (en) * 2005-03-18 2006-09-21 Delta Electronics, Inc. Rotor
US20070103023A1 (en) * 2005-11-04 2007-05-10 Canopy Tecnologies, Llc Method of compressing lamination stacks for permanent magnet rotor
US20070276491A1 (en) * 2006-05-24 2007-11-29 Disc Dynamics, Inc. Mold assembly for intervertebral prosthesis
US20100289367A1 (en) * 2009-05-12 2010-11-18 James Ching Sik Lau Permanent magnet rotor
US20110204740A1 (en) * 2008-08-20 2011-08-25 Societ De Technologie Michelin Internal Rotor for a Rotary Electric Machine with T-Shaped Magnet Wedges
US20110221296A1 (en) * 2008-08-20 2011-09-15 Societe De Technologie Michelin Internal Rotor Including a Grooved Shaft Intended for a Rotary Electric Machine
US20110254399A1 (en) * 2008-08-20 2011-10-20 Maeick Blanc Interior Rotor for a Rotary Electrical Machine and Method of Assembling It
US20120133229A1 (en) * 2009-03-20 2012-05-31 Moteurs Leroy Somer Electric device rotor and methods for manufacture
US20120326548A1 (en) * 2010-03-15 2012-12-27 Kabushiki Kaisha Yaskawa Denki Permanent magnet rotating electrical machine
US20130119808A1 (en) * 2011-11-10 2013-05-16 Nidec Corporation Motor
US20140103768A1 (en) * 2012-10-15 2014-04-17 Regal Beloit America, Inc. Radially embedded permanent magnet rotor and methods thereof
US8987966B2 (en) 2011-01-18 2015-03-24 Johnson Electric S.A. Electric motor
US9099905B2 (en) 2012-10-15 2015-08-04 Regal Beloit America, Inc. Radially embedded permanent magnet rotor and methods thereof
US20160087501A1 (en) * 2014-09-19 2016-03-24 Siemens Aktiengesellschaft Reluctance armature
US9362792B2 (en) 2012-10-15 2016-06-07 Regal Beloit America, Inc. Radially embedded permanent magnet rotor having magnet retention features and methods thereof
US20160365763A1 (en) * 2015-06-15 2016-12-15 Mabuchi Motor Co., Ltd. Rotor, motor, and method of manufacturing rotor
US9831727B2 (en) 2012-10-15 2017-11-28 Regal Beloit America, Inc. Permanent magnet rotor and methods thereof
US9882440B2 (en) 2012-10-15 2018-01-30 Regal Beloit America, Inc. Radially embedded permanent magnet rotor and methods thereof
US10284064B2 (en) * 2014-08-06 2019-05-07 Johnson Electric International AG Brushless direct current motor and rotor thread thereof having fixing pins
US10992194B2 (en) * 2017-07-04 2021-04-27 Sunonwealth Electric Machine Industry Co., Ltd. Rotor of an inner-rotor motor with reliable engagement between the shaft and the permanent magnets
US11658527B2 (en) * 2016-03-02 2023-05-23 Lg Innotek Co., Ltd. Rotor and motor comprising same
US11791677B2 (en) * 2020-01-20 2023-10-17 Lc Advanced Motor Technology Corporation Scalable rotor

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19943951A1 (de) * 1999-09-14 2001-03-22 Bosch Gmbh Robert Rotor mit symmetrischem Flußverlauf für elektrische Maschinen
DE20107523U1 (de) * 2000-05-03 2001-07-12 Leroy Somer Moteurs Umlaufende elektrische Maschine mit einem Rotor mit Flußkonzentration und einem Stator mit bewickelten Zähnen
US6891299B2 (en) 2000-05-03 2005-05-10 Moteurs Leroy-Somer Rotary electric machine having a flux-concentrating rotor and a stator with windings on teeth
FR2821024B1 (fr) 2001-02-20 2003-06-13 Leroy Somer Moteurs Element d'entrainement tel qu'une roue motrice ou un treuil de levage, comportant un moteur synchrone
FR2823616B1 (fr) 2001-04-17 2008-07-04 Leroy Somer Moteurs Machine electrique comportant au moins un detecteur de champ magnetique
FR2823612B1 (fr) 2001-04-17 2003-06-13 Leroy Somer Moteurs Stator de machine tournante electrique comportant des bobines individuelles demontables
KR100409178B1 (ko) * 2001-12-24 2003-12-12 주식회사 미크로닉 영구자석 매입형 회전자
FR2948508B1 (fr) 2009-07-22 2012-11-23 Michelin Soc Tech Procede pour la fabrication d'un rotor interieur pour machine electrique tournante.
EP2621055A1 (de) * 2012-01-27 2013-07-31 Siemens Aktiengesellschaft Elektrische Maschine und Läufer für eine elektrische Maschine
JP5945485B2 (ja) * 2012-09-21 2016-07-05 株式会社オティックス 回転電機用ロータ
GB2517410A (en) 2013-07-16 2015-02-25 Aim Co Ltd A Stator and a Rotor for an Electric Motor
GB2518348A (en) * 2013-07-16 2015-03-25 Aim Co Ltd A rotor for an electric motor
FR3018146A1 (fr) 2014-03-03 2015-09-04 Michelin & Cie Rotor pour machine electrique tournante comprenant des moyens de precontrainte d'aimants, et procede de montage associe
JP6848348B2 (ja) * 2016-10-28 2021-03-24 日産自動車株式会社 ロータ製造方法
GB2562760B (en) 2017-05-24 2020-04-01 Equipmake Ltd A rotor for an electric motor
FR3111245A1 (fr) 2020-06-08 2021-12-10 Nidec Psa Emotors Rotor de machine electrique tournante
WO2023278509A1 (en) * 2021-06-30 2023-01-05 Bryan Prucher Synchronized dual radial gap motor cluster assembly

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US4695754A (en) * 1984-05-08 1987-09-22 Dso "Elprom" Permanent magnet rotor for an electrical machine
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US5091668A (en) 1989-12-08 1992-02-25 Gec Alsthom Sa Motor having flux-concentrating permanent magnets
US5452590A (en) * 1991-07-04 1995-09-26 A.C.M. Azienda Costruzione Motori S.A.S. Di Racca Anita & C Drive device for the cylinder of a hosiery machine and rotor assembly for a brushless synchronous motor
US5554900A (en) * 1994-02-04 1996-09-10 Schlenker Enterprises Ltd. Motor including embedded permanent-magnet rotor
US5857762A (en) * 1994-01-11 1999-01-12 Schwaller; Edwin Bicycle lighting system and generator

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1996946A (en) * 1933-12-14 1935-04-09 United American Bosch Corp Magnetic rotor
US3663848A (en) * 1970-02-11 1972-05-16 Kalman Nagy Lehoczky High-speed alternating current generators
US3979821A (en) * 1975-05-09 1976-09-14 Kollmorgen Corporation Method of manufacturing rare earth permanent magnet rotor
US4658165A (en) * 1983-07-07 1987-04-14 Precision Mecanique Labinal Rotating machines with magnets on the rotor
US4506181A (en) 1984-03-02 1985-03-19 General Electric Company Permanent magnet rotor with complete amortisseur
US4658167A (en) * 1984-05-08 1987-04-14 Dso "Elprom" Rotor with permanent magnets for an electrical machine
US4695754A (en) * 1984-05-08 1987-09-22 Dso "Elprom" Permanent magnet rotor for an electrical machine
US4633113A (en) * 1985-10-16 1986-12-30 Sundstrand Corporation Side plate construction for permanent magnet rotor
US5010266A (en) 1987-09-03 1991-04-23 Fanuc Ltd Anti-clogging offset for rotor of synchronous motor
US5091668A (en) 1989-12-08 1992-02-25 Gec Alsthom Sa Motor having flux-concentrating permanent magnets
US5452590A (en) * 1991-07-04 1995-09-26 A.C.M. Azienda Costruzione Motori S.A.S. Di Racca Anita & C Drive device for the cylinder of a hosiery machine and rotor assembly for a brushless synchronous motor
US5857762A (en) * 1994-01-11 1999-01-12 Schwaller; Edwin Bicycle lighting system and generator
US5554900A (en) * 1994-02-04 1996-09-10 Schlenker Enterprises Ltd. Motor including embedded permanent-magnet rotor

Cited By (56)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6798104B2 (en) * 1999-10-14 2004-09-28 Denso Corporation Rotary electric machine for electric vehicle
US20030090167A1 (en) * 1999-10-14 2003-05-15 Denso Corporation Rotary electric machine for electric vehicle
US20040004407A1 (en) * 2002-04-29 2004-01-08 Daniel Laurent Electrical machine having a rotor specially adapted to high speeds
US6967420B2 (en) 2002-04-29 2005-11-22 Conception Et Developpement Michelin S.A. Electrical machine having a rotor specially adapted to high speeds
US20070210664A1 (en) * 2002-05-15 2007-09-13 Hitachi, Ltd. Permanent magnet rotating electric machine
US7148597B2 (en) * 2002-05-15 2006-12-12 Hitachi, Ltd. Permanent magnet rotating electric machine
US20050062355A1 (en) * 2002-05-15 2005-03-24 Hitachi, Ltd. Permanent magnet rotating electric machine
US7417346B2 (en) 2002-05-15 2008-08-26 Hitachi, Ltd. Permanent magnet rotating electric machine
US6815858B2 (en) * 2002-05-15 2004-11-09 Hitachi, Ltd. Permanent magnet rotating electric machine
US20060087189A1 (en) * 2002-05-15 2006-04-27 Hitachi, Ltd. Permanent magnet rotating electric machine
US20030222526A1 (en) * 2002-05-15 2003-12-04 Hitachi, Ltd. Permanent magnet rotating electric machine
US7233089B2 (en) 2002-05-15 2007-06-19 Hitachi, Ltd. Permanent magnet rotating electric machine
US6833639B2 (en) * 2002-12-23 2004-12-21 Cyber Industrial Ltd. Electric actuator
US20040119344A1 (en) * 2002-12-23 2004-06-24 Lau Collins Yu Cheong Electric actuator
WO2006033866A2 (en) * 2004-09-21 2006-03-30 A.O. Smith Corporation Spoke permanent magnet rotor
US7332845B2 (en) 2004-09-21 2008-02-19 A. O. Smith Coporation Spoke permanent magnet rotor
WO2006033866A3 (en) * 2004-09-21 2006-08-10 Smith Corp A O Spoke permanent magnet rotor
US7157827B2 (en) * 2004-09-21 2007-01-02 A. O. Smith Corporation Spoke permanent magnet rotor
US20070085437A1 (en) * 2004-09-21 2007-04-19 A.O. Smith Corporation Spoke permanent magnet rotor
CN101032067B (zh) * 2004-09-21 2012-06-27 雷勃电气Epc股份有限公司 辐条永磁体转子
US20060061227A1 (en) * 2004-09-21 2006-03-23 A.O. Smith Corporation Spoke permanent magnet rotor
US20060097601A1 (en) * 2004-11-10 2006-05-11 Willi Hauger Rotor arrangement for an electric machine and a method for the manufacture of a rotor arrangement
US20060125438A1 (en) * 2004-12-09 2006-06-15 Fanuc Ltd Synchronous controller
US20060208590A1 (en) * 2005-03-18 2006-09-21 Delta Electronics, Inc. Rotor
US7498705B2 (en) * 2005-03-18 2009-03-03 Delta Electronics, Inc. Rotor
US7358637B2 (en) * 2005-11-04 2008-04-15 Canopy Technologies, Llc Method of compressing lamination stacks for permanent magnet rotor
US20070103023A1 (en) * 2005-11-04 2007-05-10 Canopy Tecnologies, Llc Method of compressing lamination stacks for permanent magnet rotor
US20070276491A1 (en) * 2006-05-24 2007-11-29 Disc Dynamics, Inc. Mold assembly for intervertebral prosthesis
US20110221296A1 (en) * 2008-08-20 2011-09-15 Societe De Technologie Michelin Internal Rotor Including a Grooved Shaft Intended for a Rotary Electric Machine
US8723383B2 (en) * 2008-08-20 2014-05-13 Michelin Recherche Et Technique S.A. Interior rotor for a rotary electrical machine and method of assembling it
US20110254399A1 (en) * 2008-08-20 2011-10-20 Maeick Blanc Interior Rotor for a Rotary Electrical Machine and Method of Assembling It
US20110204740A1 (en) * 2008-08-20 2011-08-25 Societ De Technologie Michelin Internal Rotor for a Rotary Electric Machine with T-Shaped Magnet Wedges
US20120133229A1 (en) * 2009-03-20 2012-05-31 Moteurs Leroy Somer Electric device rotor and methods for manufacture
US9112393B2 (en) * 2009-03-20 2015-08-18 Control Techniques Dynamics Limited Electric device rotor and methods for manufacture
US20100289367A1 (en) * 2009-05-12 2010-11-18 James Ching Sik Lau Permanent magnet rotor
US8692431B2 (en) * 2009-05-12 2014-04-08 Johnson Electric S.A. Permanent magnet rotor
US9219389B2 (en) * 2010-03-15 2015-12-22 Kabushiki Kaisha Yaskawa Denki Permanent magnet rotating electrical machine
US20120326548A1 (en) * 2010-03-15 2012-12-27 Kabushiki Kaisha Yaskawa Denki Permanent magnet rotating electrical machine
US8987966B2 (en) 2011-01-18 2015-03-24 Johnson Electric S.A. Electric motor
US20130119808A1 (en) * 2011-11-10 2013-05-16 Nidec Corporation Motor
US20140103768A1 (en) * 2012-10-15 2014-04-17 Regal Beloit America, Inc. Radially embedded permanent magnet rotor and methods thereof
US9099905B2 (en) 2012-10-15 2015-08-04 Regal Beloit America, Inc. Radially embedded permanent magnet rotor and methods thereof
US9246364B2 (en) * 2012-10-15 2016-01-26 Regal Beloit America, Inc. Radially embedded permanent magnet rotor and methods thereof
US11277045B2 (en) 2012-10-15 2022-03-15 Regal Beloit America, Inc. Radially embedded permanent magnet rotor and methods thereof
US9362792B2 (en) 2012-10-15 2016-06-07 Regal Beloit America, Inc. Radially embedded permanent magnet rotor having magnet retention features and methods thereof
US10608488B2 (en) 2012-10-15 2020-03-31 Regal Beloit America, Inc. Radially embedded permanent magnet rotor and methods thereof
US9831727B2 (en) 2012-10-15 2017-11-28 Regal Beloit America, Inc. Permanent magnet rotor and methods thereof
US9882440B2 (en) 2012-10-15 2018-01-30 Regal Beloit America, Inc. Radially embedded permanent magnet rotor and methods thereof
US9923423B2 (en) 2012-10-15 2018-03-20 Regal Beloit America, Inc. Radially embedded permanent magnet rotor and methods thereof
US10284064B2 (en) * 2014-08-06 2019-05-07 Johnson Electric International AG Brushless direct current motor and rotor thread thereof having fixing pins
US10581290B2 (en) * 2014-09-19 2020-03-03 Siemens Aktiengesellschaft Reluctance armature
US20160087501A1 (en) * 2014-09-19 2016-03-24 Siemens Aktiengesellschaft Reluctance armature
US20160365763A1 (en) * 2015-06-15 2016-12-15 Mabuchi Motor Co., Ltd. Rotor, motor, and method of manufacturing rotor
US11658527B2 (en) * 2016-03-02 2023-05-23 Lg Innotek Co., Ltd. Rotor and motor comprising same
US10992194B2 (en) * 2017-07-04 2021-04-27 Sunonwealth Electric Machine Industry Co., Ltd. Rotor of an inner-rotor motor with reliable engagement between the shaft and the permanent magnets
US11791677B2 (en) * 2020-01-20 2023-10-17 Lc Advanced Motor Technology Corporation Scalable rotor

Also Published As

Publication number Publication date
ATE319213T1 (de) 2006-03-15
DE69930040T2 (de) 2006-10-26
JP2000152537A (ja) 2000-05-30
EP1001507B1 (de) 2006-03-01
ES2257837T3 (es) 2006-08-01
DE69930040D1 (de) 2006-04-27
US20020047424A1 (en) 2002-04-25
EP1001507A1 (de) 2000-05-17

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